Fixing typos and Troubleshooting SSH in day 64

[DevITJAX]

This PR fixes a small typo in Day 64 of the 90DaysOfDevOps Ansible section.

Changes:

1. Corrected the command ansible Linux -m ping to ansible linux -m ping

   • Inventory group names in Ansible are lowercase, and the examples earlier in the page
     use [linux], so the command needed correction.

2. Added a troubleshooting section explaining the SSH host key checking error:
   "Using a SSH password instead of a key is not possible because Host Key checking is enabled…"

   • This error commonly happens in Vagrant/VirtualBox lab environments.
   • Included the fix:
     export ANSIBLE_HOST_KEY_CHECKING=False

Reasoning:

• Improves accuracy and avoids confusion for beginners.
• Provides a practical solution for a common issue people encounter when following the tutorial.

Thank you for the great learning material happy to contribute!

[github-actions]

Our team will soon review your PR. Thanks @DevITJAX :)

[github-actions]

Hello there, thanks for opening your first Pull Request. Someone will review it soon. Welcome to the #90DaysOfDevOps community!

[Copilot]

Pull request overview

This PR improves Day 64 of the 90DaysOfDevOps Ansible tutorial by fixing command case sensitivity and adding helpful troubleshooting guidance for a common SSH error encountered in lab environments.

Key Changes:

• Corrected ansible Linux -m ping to ansible linux -m ping for proper case consistency with Ansible inventory group naming conventions
• Added troubleshooting section explaining SSH host key checking errors and providing the solution using export ANSIBLE_HOST_KEY_CHECKING=False

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[Copilot]

The troubleshooting section needs proper markdown formatting:

1. Add a blank line between line 60 and the new section
2. Format the title as a heading (e.g., ### Troubleshooting: SSH Host Key Checking Error)

This will ensure consistency with the rest of the document structure and improve readability.

Suggested change

	Troubleshooting: SSH Host Key Checking Error
	### Troubleshooting: SSH Host Key Checking Error

[Copilot]

Grammar error: "a SSH" should be "an SSH" since SSH is pronounced with a vowel sound (ess-ess-aitch).

Suggested change

	`Using a SSH password instead of a key is not possible because Host Key checking is enabled and sshpass does not support this.
	`Using an SSH password instead of a key is not possible because Host Key checking is enabled and sshpass does not support this.